Older on average than JS programmers, that's a reasonable assumption if you also assume that the "surge in popularity" brought a ton of kids to JS. But that they're older in general on average (i.e. not a lot of young C++ developers)? I would doubt that.
Moreover, C++ isn't outdated, it's mature. There aren't any grand new CS discoveries that are in JS but C++ maintainers haven't heard of yet.
As for "older = unlikely to be interested in developing games", I don't see where you get that from. It's like saying "older people are unlikely to be interested in writing books / making movies".
Moreover, C++ isn't outdated, it's mature. There aren't any grand new CS discoveries that are in JS but C++ maintainers haven't heard of yet.
As for "older = unlikely to be interested in developing games", I don't see where you get that from. It's like saying "older people are unlikely to be interested in writing books / making movies".